The present invention discloses a method for inhibiting coking of a filter of a gasoline desulfurization reactor. The method includes: a hydrogen stream is introduced to the lower part of the filter of the gasoline desulfurization reactor, and mixed with hydrogen desulfurization reaction products, so as to improve the hydrogen to oil ratio of the reaction products. The method can be flexibly adjusted to improve the hydrogen to oil ratio of the reaction products. The coking on the adsorbent powder on the surface of a filter core of the reactor filter and gaps of a filter material can be effectively eased, so as to curb clogging of filter channel, greatly weaken the adhesion force of adsorbent powder within the filter core channel, and improve blowback effect of the reactor filter under the same blowback conditions; therefore, the method can extend the service life of the reactor filter.